Characteristics of oxide pegs in Ti- and Y-doped CoNiCrAl alloys at 1150 °C

Liu, Yang; Zheng, Yuan; Wan, Chunlei; Gong, Qianming; Zhang, Chi; Chen, Hao; Yang, Zhigang

doi:10.1007/s12598-020-01577-0

Cited by 15 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the reactive element could improve the adhesion of the oxide scale due to the formation of oxide pegging [34][35][36][37][38][39][40]. Figure 4b found that oxide pegging nailed into the nanocrystalline coating after oxidation for 100 h. More importantly, the presence of Zr-rich oxides could be observed in oxide pegging, as shown in Figure 5.…”

Section: The Influence Of Reactive Element Zr In the Superalloy K38mentioning

confidence: 94%

The Impact of Various Superalloys on the Oxidation Performance of Nanocrystalline Coatings at High Temperatures

Meng,

Yang,

Zhao

et al. 2023

Coatings

View full text Add to dashboard Cite

Nanocrystalline coatings with the same chemical composition as an N5 superalloy were prepared on K38 and N5 superalloys by magnetron sputtering. The effect of different superalloys on the high temperature oxidation behavior of nanocrystalline coatings was investigated through oxidation kinetics, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and wavelength dispersive spectrometry (WDS). The results indicated that K38-N5 had better oxidation resistance than N5-N5 due to the diffusion of Zr from the K38 superalloy into the oxide scale. In addition, no interdiffusion occurred in the K38 superalloy. The formation of Ta-rich phases in the Al2O3 scale leads to decrease the oxidation resistance of nanocrystalline coatings. However, the presence of Zr inhibits the formation of Ta-rich phases.

show abstract

Section: The Influence Of Reactive Element Zr In the Superalloy K38mentioning

confidence: 94%

The Impact of Various Superalloys on the Oxidation Performance of Nanocrystalline Coatings at High Temperatures

Meng,

Yang,

Zhao

et al. 2023

Coatings

View full text Add to dashboard Cite

show abstract

“…Rare earth elements are very active and will form fine rare earth oxide particles in the oxide film. These CeO 2 oxides serve as nucleation sites for Mn oxides and promote the formation of Mn oxides [33], which can inhibit the further growth of the oxide film. On the other hand, due to the large size of the rare earth elements, the lattice distortion caused by the solid solution of the element Ce in the matrix can increase the degree of lattice openness, which is conducive to the diffusion of reactive elements such as Cr [34] and promotes the formation of the oxide film within Cr 2 O 3 .…”

Section: Strengthening Mechanism Of W-and Ce-containing Ferritic Stai...mentioning

confidence: 99%

High-Temperature Cyclic Oxidation Behavior and Microstructure Evolution of W- and Ce-Containing 18Cr-Mo Type Ferritic Stainless Steel

Zheng,

Feng,

Zhao

et al. 2024

Materials

View full text Add to dashboard Cite

Due to the recurrent starting and stopping operations of automobiles during service, their engines’ hot ends are continually subjected to high-temperature cyclic oxidation. Therefore, it is crucial to develop ferritic stainless steels with better high-temperature oxidation resistance. This study focuses on improving the high-temperature cyclic oxidation performance of 18Cr-Mo (444-type) ferritic stainless steel by alloying with high-melting-point metal W and the rare earth element Ce. For this purpose, a high-temperature cyclic oxidation experiment was designed to simulate the actual service environment and investigate the high-temperature cyclic oxidation behavior and microstructure evolution of 444-type ferritic stainless steel alloyed with W and Ce. The oxide structure and composition formed during this process were analyzed and characterized using scanning electron microscopy/energy dispersive spectroscopy (SEM-EDS) and electron probe X-ray micro-analyzer (EPMA), in order to reveal the mechanism of action of W and Ce in the cyclic oxidation process. The results show that 18Cr-Mo ferritic stainless steel alloyed with W and Ce exhibits an excellent resistance to high-temperature cyclic oxidation. The element W can promote the precipitation of the Laves phase between the matrix and the oxide film, and the small-sized Laves phase can inhibit the interfacial diffusion of oxidation reaction elements and prevent the inward growth of the oxide film. The element Ce can refine oxide particles and reduce the thickness of the oxide film. CeO2 particles within the oxide film can serve as nucleation sites for the formation of oxide particles from reactive elements, and they also contribute to pinning the oxide film, thereby enhancing its adhesion.

show abstract

“…It can simultaneously measure more than 50 compounds at the single cell level, significantly enhancing the ability to evaluate cellular metabolic processes and complex cellular systems. [106][107][108][109] Some representative studies are described in subsequent paragraphs.…”

Section: Mass Cytometrymentioning

confidence: 99%